[mythtv-users] Scanning for a particular channel (DVB-S)

[John Pilkington]

On 05/04/14 11:06, Stephen Worthington wrote:
> On Sat, 05 Apr 2014 11:41:28 +0200, you wrote:
>
>> Hi,
>>
>> I have mythtv and my TV (via a built-in tuner) connected to my satellite
>> dish. It does find a lot of channels during a full tuned channel scan -
>> but not one particular channel I am looking for (and which is present on
>> the TV). The web site says the channel is on Astra 19.2, Transponder
>> 103, 12,460.5 MHz, 27.5 MSyb/s, 3/4 FEC, unencrypted.
>>
>> I thus do a full tuned scan in mythtv backend with the following data:
>>
>> Frequency 12460500 (also tried 12460000)
>> Polarity Horizontal
>> Symbol Rate 27500000
>> Mod Sys DVB-S
>> FEC Auto (or 3/4)
>> Modulation QPSK
>> Inversion Auto
>> Roll-off 0.35
>>
>> But I just get "no lock".
>>
>> Any hint what else I could try? The channel is present on the TV, so I
>> should be able to see it.
>>
>> Thanks.
>
> I have two DVB-S cards:
>
>    TeVii S470 (PCIe)
>    TBS 5922 (USB)
>
> The TBS card can tune the HD multiplexes from my satellite provider,
> but the TeVii card can not see them.  So maybe it is the same between
> your DVB-S card and your TV.  My HD transponders are on these
> frequencies:
>
>    12267000 Hz
>    12331000 Hz
>    12358000 Hz
>
> You could try scanning using other software such as scan, w_scan and
> scan-s2 to see what your card can tune.
>
> It is also possible that the transponder you want has a low signal
> level.  So the signal level at your TV might be enough for its tuner,
> but not for the DVB-S card, which might be less sensitive or have a
> worse connection to the dish.

I currently have the opposite situation in DVB-T.  A new local mux is 
being set up but not yet officially launched.  Myth can tune and record 
two channels in it (kids/shopping) but my TV will not.  I suspect they 
are marked as 'hidden', perhaps to reduce payments for content.